Specifications: Objective diameter: 90 mm True aperture: 90 mm Focal length: 500 mm Focal ratio: f/5.6 IPD: 59 – 80 mm Focus type: IF Waterproof: no Weight (measured, w/o eyepieces, with eyepiece cover and objective caps): 5‘980g Made in: Japan Remarks: Borg of Japan produces a line of astronomical telescopes, components and accessories […]
Specifications: Objective diameter: 40 Magnification: 10 x Exit pupil: 4 mm Eye relief (acc. to spec): 16 mm Useable eye relief (measured from rim of eyecup): 14 mm IPD: 55 – 75 mm RFOV: 6.0 degrees = 104 m AFOV (measured, rounded): 60 degrees Minimum focus distance (measured): 5.5 m Focus type: CF (direction of […]
Specifications: Objective diameter: 35 Magnification: 7 x Exit pupil: 5 mm Eye relief (acc. to spec): 16 mm Useable eye relief (measured from rim of eyecup): 13.5 mm IPD: 55 – 75 mm RFOV: 8.0 degrees = 140 m AFOV (measured, rounded): 57.5 degrees Minimal focus distance (measured): 4.0 m Focus type: CF (direction of […]
Specifications: Objective diameter: 40 Magnification: 8 x Exit pupil: 5 mm Eye relief (acc. to spec): 16 mm Useable eye relief (measured from rim of eyecup): 14 mm IPD: 55 – 75 mm RFOV: 7.0 degrees = 123 m AFOV (measured, rounded): 57.5 degrees Minimal focus distance (measured): 4.8 m Focus type: CF (direction of […]
Specifications: Objective diameter: 50 mm Magnification: 12 x Exit pupil: 4.2 mm Eye relief (acc. to spec): 13 mm Usable eye relief (measured from rim of eyecup): 11 mm RFOV: 5.7 degrees = 100 m AFOV (measured, rounded): 68.5 degrees Minimum focus distance (measured): 3.15 m Focus type: CF (direction of rotation from close to […]
Specifications: Objective diameter: 20 mm Magnification: 8 x Exit pupil: 2.5 mm Eye relief (acc. to spec): 13.5 mm Usable eye relief (measured from rim of eyecup): 13 mm IPD: 56 – 72 mm RFOV: 6.6 degrees = 115 m AFOV: 49.5 degrees Minimal focus distance (measured): 1.9 m Focus type: CF (direction of rotation […]
Specifications: Objective diameter: 22 mm Magnification: 8 x Exit pupil: 2.75 mm Useful eye relief (measured from rim of eyecup): 12 mm IPD: 42 – 72 mm RFOV: 7.1 degrees = 125 m Minimum focus distance (measured): 3.1 m Focus type: CF (direction of rotation from close to infinity: > clockwise) Degrees of rotation of […]
Specifications: Objective diameter: 32 mm Magnification: 8 x Exit pupil: 4 mm Eye relief (acc. to spec): 18.5 mm Usable eye relief (measured from rim of eyecup): 14 mm IPD: 54 – 76 mm RFOV: 7.8 degrees = 136 m AFOV: 57.2 degrees Minimum focus distance (measured): 2.05 m Focus type: CF (direction of rotation […]
Specifications: Objective diameter: 42 mm Magnification: 8 x Exit pupil: 5.25 mm Eye relief (acc. to spec): 17 mm Useful eye relief (measured from rim of eyecup): 15mm IPD: 57 – 76 mm RFOV: 8.2 degrees = 143 m AFOV (measured, rounded): 60 degrees Minimum focus distance (measured): 1.6 m Focus type: CF (direction of […]
Specifications: Objective diameter: 32 mm Magnification: 6.5 x Exit pupil: 4.9 mm Eye relief (acc. to spec): 17 mm Useful eye relief (measured from rim of eyecup): 14.5mm IPD: 58 – 77 mm RFOV (acc. to spec.): 10.0 degrees = 175 m RFOV (measured): 9.8 degrees = 171 m AFOV (measured, rounded): 60 degrees Minimum […]